Golf ball with polysulfide rubber layer
A golf ball with at least one moisture vapor barrier layer is disclosed. In accordance to one aspect of the invention, the moisture vapor barrier layer may comprise a polysulfide rubber Polysulfide rubber may be applied to the golf ball in a liquid form curable at an elevated temperature or at room temperature. The liquid form may be mixed from two or more components prior to being applied to the ball. The liquid form may have water mixed therein before being applied to the ball. Alternatively, the liquid form may be applied to the ball without any additional mixing.
1 . A golf ball comprising a core, a moisture vapor barrier layer and a cover, wherein the moisture barrier layer has a moisture vapor transmission of less than 0.6 grams*mm/m 2 *day and a thickness of 0.001 to 0.05 inch and comprises a curable material formed from a polysulfide rubber and flakes that substantially cures in less than 1 hour at 70° F. to 75° F.
2 . The golf ball of claim 1 , wherein the polysulfide rubber is applied to a layer of the golf ball in a liquid form and thereafter cured.
3 . The golf ball of claim 1 , wherein the polysulfide layer is applied to a layer of the ball in a solid form heated to a flowable state.
4 . The golf ball of claim 1 , wherein the polysulfide layer comprises two half-shells applied to the core of the ball.
5 . The golf ball of claim 1 , wherein the cover has a Shore D hardness of less than 50.
6 . The golf ball of claim 1 , wherein the cover has a Shore D hardness in the range of about 30 to about 40.
7 . The golf ball of claim 1 , wherein the cover comprises a thermoset material.
8 . The golf ball of claim 1 , wherein the cover has a thickness of about 0.010 inch to about 0.050 inch.
9 . The golf ball of claim 1 , wherein the moisture vapor barrier layer has a specific gravity of about 1.2 to about 1.3.
10 . The golf ball of claim 1 , wherein the polysulfide rubber comprises a liquid polyalkylene polysulfide.
11 . The golf ball of claim 1 , wherein the polysulfide rubber comprises an isocyanate-terminated polysulfide.
12 . The golf ball of claim 1 , wherein the polysulfide rubber comprises a thiol terminated polysulfide.
13 . The golf ball of claim 1 , wherein the polysulfide rubber comprises a hydroxyl terminated polysulfide.
14 . The golf ball of claim 1 , wherein the curable material further comprises a curing agent and a deliquescent agent.
15 . The golf ball of claim 1 , wherein the curable material further comprises a curing agent and a desiccating agent.
16 . The golf ball of claim 14 , wherein the curing agent is an organic oxidizing agent.
17 . The golf ball of claim 16 , wherein the organic oxidizing agent is dinitro benzene.
18 . The golf ball of claim 14 , wherein the curing agent is an alkali metal or alkali metal salt peroxide.
19 . The golf ball of claim 18 , wherein the alkali metal or alkali metal salt peroxide is sodium peroxide, sodium pyrophosphate peroxide, sodium carbonate peroxide or sodium perborate.
20 . The golf ball of claim 14 , wherein the curing agent is an alkali earth metal peroxide.
21 . The golf ball of claim 20 , wherein the alkali earth metal peroxide is calcium peroxide or barium peroxide.
22 . The golf ball of claim 14 , wherein the curing agent is an oxidizing agent.
23 . The golf ball of claim 22 , wherein the oxidizing agent is zinc peroxide, lead peroxide or manganese peroxide.
24 . The golf ball of claim 14 , wherein the curing agent is a lower alkyl tin oxide.
25 . The golf ball of claim 24 , wherein the lower alkyl tin oxide is di-n-butyl tin oxide.
26 . The golf ball of claim 1 , wherein the polysulfide is made from reacting a hydroxyl terminated polysulfide with a polyisocyanate.
27 . The golf ball of claim 1 , wherein the specific gravity of the moisture vapor barrier layer is greater than 1.5.
28 . The golf ball of claim 1 , wherein the specific gravity of the moisture vapor barrier layer is greater than 2.0.